// Copyright (C) 2010, Scott W. Dunlop <swdunlop@gmail.com>
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//    * Redistributions of source code must retain the above copyright
//      notice, this list of conditions and the following disclaimer.
//    * Redistributions in binary form must reproduce the above copyright
//      notice, this list of conditions and the following disclaimer in the
//      documentation and/or other materials provided with the distribution.
//    * Neither the name of the <organization> nor the
//      names of its contributors may be used to endorse or promote products
//      derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
// ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef NOSPEX_UTIL_H
#define NOSPEX_UTIL_H 1

#ifndef NOSPEX_IMPL_SOURCE
#error This header should only be used by NoSpex implementation files.
#endif //ifndef NOSPEX_SOURCE

#define FOREACH_NODE( graph, node ) \
    for( node = (graph)->first_node; \
         node != NULL; \
         node = (nx_node_p) NEXT(node) )

#define FOREACH_LINK( graph, link ) \
    for( link = (graph)->first_link; \
         link != NULL; \
         link = (nx_link_p) NEXT(link) )

#define FOREACH_BLIP( graph, blip ) \
    for( blip = (graph)->first_blip; \
         blip != NULL; \
         blip = (nx_blip_p) NEXT(blip) )

#define NEXT( e ) \
    ((void*)((e)->elem.next))

#define PREV( e) \
    ((void*)((e)->elem.prev))

#define KIND( rsrc )\
    (((nx_resource_p) (rsrc))->kind)

#define IS_GRAPH( rsrc ) \
    (KIND(rsrc) == NX_GRAPH_KIND)

#define IS_INFO( rsrc ) \
    (KIND(rsrc) == NX_INFO_KIND)

#define IS_ELEM( rsrc ) \
    (KIND(rsrc) & NX_ELEMENT_KIND)

#define IS_BLIP( rsrc ) \
    (KIND(rsrc) == NX_BLIP_KIND)

#define IS_LINK( rsrc ) \
    (KIND(rsrc) == NX_LINK_KIND)

#define IS_NODE( rsrc ) \
    (KIND(rsrc) == NX_NODE_KIND)

#define IS_TIMER( rsrc ) \
    (KIND(rsrc) == NX_TIMER_KIND)

unsigned int nx_random_int( unsigned int max );
double nx_random_pct( );

nx_resource_p nx_create_resource( int kind, unsigned short size );
#endif //ifndef NOSPEX_UTIL_H
